feat: bind Interval data type to Python timedelta

[rad-pat]

I'm trying to introduce Interval datatype to SQLAlchemy dialect which uses BendSQL as a driver.
Can we please have the Interval type map to a Python datetime.timedelta, currently it is returned as string and causes test failures on the SQLAlchemy side, e.g.
AssertionError: ('24:00:04',) != (datetime.timedelta(days=1, seconds=4),)

[everpcpc]

cc @TCeason could you help with this?

[rad-pat]

FYI, I have worked around this for the time being by parsing the string result: https://github.com/PlaidCloud/databend-sqlalchemy/blob/interval/databend_sqlalchemy/types.py#L88..L109

[TCeason]

FYI, I have worked around this for the time being by parsing the string result: https://github.com/PlaidCloud/databend-sqlalchemy/blob/interval/databend_sqlalchemy/types.py#L88..L109

Yes. The string format is single. We can add same parse logic in bendsql.